A nationwide manhunt is underway for a convicted sex offender, his girlfriend and her 3-year-old daughter.

According to U.S. Marshals, 27-year-old Robbie Douglas Potter escaped from a halfway house in Mansfield last month with the help of his girlfriend, 24-year-old Candace Watson.

Authorities believe Potter is on the run with Watson and her daughter Haylee. Federal arrests warrants are out for both Watson and Potter.

“Our major concern in this case is little Haylee, she’s the innocent victim here,” says Deputy U.S. Marshal Brian Fitzgibbon.

Potter is a Tier 3 sex offender, the most serious classification. Fitzgibbon says Potter was ordered to stay away from minors.

Investigators believe the couple is driving a two-tone Chevy pickup truck with temporary Ohio plate Q645916. Investigators say the truck has a lightning bolt design on the sides and decals on the back window.

Anyone with information is being asked to call (866)4-WANTED. A $10,000 reward is being offered to anyone with information leading to an arrest.

What kind of mother takes off with a convicted child rapist? Is the desire to have a man in her life just completely blinding her to the danger that she is putting her child in? How do you even start to rationalize that?